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10 | Product Description
SB625WS/SB745WS6 720 805 218 (2016/02)
2.9.2 Technical Data
Description Unit SB625WS SB745WS
160 220 290 370 480 640 800 1050 1300 1550
Fuel Gas Gas Gas Gas Gas Gas Gas Gas Gas Gas
Rated input (Nat. Gas) MBH
(kW)
563
(164.9)
788
(230.9)
1014
(297.1)
1314
(385.0)
1689
(494.9)
2200
(644.7)
3003
(880.0)
3754
(1100.0)
4692
(1375.0)
5443
(1595.0)
Rated input (#2 Oil) GPH
(LPH)
4.0
(15.1)
5.6
(21.2)
7.2
(27.3)
9.3
(35.2)
12.0
(45.4)
15.7
(59.4)
21.4
(81.0)
26.8
(101.4)
33.5
(126.8)
38.8
(146.9)
Gross output MBH
(kW)
532
(159.7)
745
(218.2)
959
(280.9)
1243
(364.1)
1598
(468.1)
2081
(609.5)
2846
(833.0)
3529
(1033.7)
4364
(1278.3)
5029
(1473.1)
Sensible losses from
stack
% 1.7 1.7 1.5 1.5 1.9 1.9 1.9 1.9 1.9 1.9
Jacket losses with
burner mounted
% 0.3 0.3 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6
Flue gas temperature
(T)
°F
( °C)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
Flue gas mass flow rate
1
1. Depends on return temperature 86-140 °F (30-60 °C)
lbs/sec
(kg/sec)
0.15
(0.07)
0.19
(0.09)
0.26
(0.12)
0.33
(0.15)
0.44
(0.20)
0.57
(0.26)
0.72
(0.33)
0.94
(0.43)
1.19
(0.54)
1.38
(0.63)
Fireside pressure drop
2
2. At maximum output with water temps supply/return of 176/140 °F (80/60 °C) and CO2 = 9.7 %
Inch W.C
(mbar)
0.802
(2.0)
1.083
(2.7)
1.284
(3.2)
1.846
(4.6)
2.007
(5.0)
2.208
(5.5)
2.288
(5.7)
2.529
(6.3)
2.729
(6.8)
2.970
(7.4)
Firebox volume Ft3
(dm³)
6.07
(172)
6.07
(172)
8.51
(241)
9.85
(279)
15.61
(442)
17.51
(496)
26.59
(753)
30.15
(854)
36.62
(1037)
44.10
(1249)
Total volume of flue gas
side
Ft3
(dm³)
8.93
(253)
9.78
(277)
14.58
(413)
17.02
(482)
26.03
(737)
30.37
(860)
45.55
(1290)
51.34
(1454)
62.25
(1763)
74.05
(2097)
Heat exchanger surface
area
Ft2 (m²) 65.65
(6.1)
94.72
(8.8)
139.93
(13.0)
175.45
(16.3)
234.65
(21.8)
310.00
(28.8)
426.25
(39.6)
500.52
(46.5)
604.93
(56.2)
670.37
(62.2)
Specific heat load MBH/ft2
(kw/m²)
8.28
(26.18)
8.04
(25.40)
7.07
(22.32)
7.29
(23.01)
6.99
(22.08)
7.06
(22.29)
6.42
(20.26)
7.29
(23.01)
7.54
(23.79)
7.89
(24.94)
Maximum condensate
production
Gal/h
(l/h)
4.86
(18.4)
7.23
(27.4)
8.42
(31.9)
10.80
(40.9)
13.78
(52.2)
19.49
(73.8)
23.24
(88.0)
29.42
(111.4)
35.05
(132.7)
42.13
(159.5)
Maximum working
pressure
PSI
(bar)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
Maximum admissible
temperature
°F
( °C)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
Maximum working
temperature
°F
( °C)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
Pressure drop T
18 °F (10 °C)
Ft. Hd.
(mbar)
5.0
(150.1)
3.3
(100.4)
4.1
(121.5)
4.3
(128.7)
1.0
(30.2)
1.1
(33.8)
1.5
(46.4)
1.8
(54.0)
1.2
(36.0)
1.4
(43.2)
Pressure drop T
36 °F (20 °C)
Ft. Hd.
(mbar)
1.2
(36.3)
0.9
(28.4)
1.0
(30.6)
0.9
(28.7)
0.3
(8.5)
0.3
(9.0)
0.4
(13.4)
0.5
(16.3)
0.3
(10.2)
0.4
(11.3)
Water capacity Gal
(l)
85.3
(323)
95.1
(360)
130.7
(495)
146.6
(555)
196.2
(743)
203.4
(770)
348.7
(1320)
368.5
(1395)
482.1
(1825)
501.9
(1900)
Table 5 Technical Data
10


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